Those officers that held the door shut are amazing!
Was the P.M.'s plane chartered?
Back around 1989 I knew someone who was traveling quite a bit in Russia. I know, NZ is a far cry from Russia, but, he said on quite a few of the flights of smaller Russian commuter airlines, the doors were held shut with bailing wire. Yikes.
,,, I think flights are chartered from time to time if her schedule doesn't tie in with regular air carriers or if an Air Force plane is unavailable. I suspect this particular flight may have been a small NZ Air Force plane for city hopping.